Mathcad

Hello,   I have a problem implementing a recursive funcion in Mathcad Prime 3.1, hope someone can help me make it work. I want to calculate a heat transfer layer per layer. So the array should work like this: T_layer,time Here's what I want it to do: Take given Temperature T_0,0 and given Temperature T_1,0 and calculate Q.dot_1,1. With Q.dot_1,1 and a given time increment (t) calculate Q_1,1. With Q_1,1 and the mass (which is dependent on the layer) I want to calculate T_1,1. With it and T_0,1 (given) calculate Q.dot_1,2 and so on Meanwhile it should also calculate the other layers. So T_1,0 and T_2,0 (both given) to Q.dot_2,1 with t to Q_2,1 with the mass to T_2,1. Now T_2,1 and T_1,1 (from the first layer calculation) to Q.dot_2,2 and with t to Q_2,2 and so on. I hope I could explain it well enough. Thanks in advance, David EDIT: Thanks to FredKohlhepp I zipped and uploaded the worksheet

Hello to all,   I am having another 'simple' moment where I am going round in circles and am starting to feel a bit dim.   In the attached is a simple thermo question I am trying to complete.   I have completed a-c with some ease but am struggling with d. where the hint is to evaluate the integral of pressure over dVolume in the associated Pressure/Volume graph.    I know that the integral of an isothermal expansion is either P*V*In(r) = heat supplied or m*R*T*In(r)   Where P and V are the initial (Pre-expansion) Pressure and Volume respectively and r is the ratio of expansion i.e. V2/V1. m being mass and R being the gass constant.    As all figures given are specific i.e. no mass of air is specified I don't beleive I can use mRTIn(r) but cannot evaluate PVIn(r) as I don't know what the initial volume is...   I know that the heat supplied (well my calculations beleive it is) 187.5 kJ/kg.    I beleive the approach is to calculate th

I have this formula  but some time the expression is divided by zero . How to disregard this warning ?        

I'm wondering if there is a simple way to perform this, as I can't figure it out.   Let's saying we're using a solve block to develop a solution - in this case the flow through multiple orifices in series.  Easy enough to enter the equations and solve as follows:   But if we have 10 orifices, that's a lot of typing.  Is there a way to use indices or otherwise simplify this?  I was thinking of something along these lines, but can't get it to work.  Judging by the error maybe it's impossible.       This still shows N=2 orifii as a starting point, but the table could have 2, 3, .. N rows.   Any thoughts or solutions would be appreciated. 4.0 attached. Thanks!

I'm trying to compute the stress in a thick walled cylinder using a matrix that has two pressure values stored in it. When my supervisor and I were going over the calculations, we noticed that one form of our von Mises stress formula will give the correct answers, while another equivalent form of the exact same formula will give erroneus values. However, when I set the pressure variable to just one of the values that are included in the matrix, it computes it correctly. Is this a bug with Mathcad, or am I doing something wrong?

Hello to All!   I am for some reason struggling with what should be very basic. This is part of a worked Thermo Dynamics problem and I have followed all logic to the final point where the final volume in a piston is to be found. In the attached screen shot you can see the numbers I am working with. However I have triend substituting in the gas law to the 1st law of thermo dynamics and have not been able to create an identity between the two sides and likewise can't follow the logic of "Tfinal can be eliminated to give Vfinal" any help, as always, really appreicated.   Cheers,   Andy  

There is a formula for the shape of the heart - not the anatomical heart, and the RomanticI derived an approximate formula for the shape of human kidneys.1. Do you know the formula for the shape of a real heart?2. I'm looking for formulas for the lungs, stomach, liver and other internal organs of a person. More about this problem Tomography  

Study 29 of the book "Physical and Mathematical Studies with Mathcad and Internet" Color drawings, animations and files of the study 29 Figs and Sheets

Hello, Can you merge or join 2 mathcad prime files together and save it as one file? I don't want to use the copy and paste, I have different headers, footers etc, and copy/paste creates a mess.

I would like to get vectors X, Y and Z with random numbers? But a random numbers is only in last elements. Why? See please the attach with archived Mathcad 15 sheet!

How do you enter the equation below in mathcad prime 4.0       thanks for the help

Dear all,   I want to combine two 3D plots (M, N, V) and (M1, N1, V1)   into a single 3D plot in Mathcad.   I attached my code below.   Could anyone help me   Thanks.    

Coworker and I are using Mathcad 15.  I made changes to a Mathcad sheet where margins look fine and everything is correct; and the coworker opens and saves changes but figures (jpeg images) and various formatting issues with text and margins change.  I open up the last saved document and everything is out of place.  Anyone experience this issue?

I have tried to solve this summation with symbolic calculation but it does not give me an answer: If I give a value to n, I get an answer: Which keyword or modifier should I use to get a response without giving a numeric value to n?? Would appreciate any help to solve this problem.

Referring to the report extract I have attached, I have an array that captures reserve factors of a structrual analysis. It also captures the input data into those reserve factors. I have two issues with the display of this data. 1) I cannot customise the units, i.e. I would rather some of the psi units be displayed as psf however it appears that mathcad does not allow the use of custom units in arrays? Further to this, when I backspace on a unti, it deletes the whole array rather than just the unit I want to delete and replace.   2) The RF column needs to be displayed as 2 decimal places but not the allowable or applied columns, these need no decimal places however, when I select the value or the column I need to change and then change the number of decimal places to be displayed, it changes all values in the array not just the column or value I have selected within the array?   Note that both of these techniques work with the individual values outside the array. To me, thes

I am trying to solve the main equation of the attached article. I can easily reproduce table 3 of the article but am not able to reproduce table 4 and 5. Would someone be so kind what to look what could cause this behavior? Thanks in advance!

I attached the file that I am having issues with. I am trying to plot three of my functions onto a single graph but right now they arent working. I think there is a problem with the input variable that I am using. I also don't know how to get three functions to plot on one graph. I've also attached a pdf with an example problem that shows roughly how the graph should look along with the funcitons used. My circuit is different which is why some of the functions may look different. 

It is not a question but an idea. But I have not an access to PTC Mathcad Ideas block!  Why? I do not now! But it will be good to insert r1:= in the marker placeholder, to move vertical or horizontal marker on the plot and see the value of the variable v2 and orthes!

I've made a MathCad template and the answer is correct when I don't include units, but when I include units the answer is incorrect. Also the units that get returned are not what they are supposed to be. Thanks!  

The professor ask to write the equation and the values. Is it possible it Mathcad? for example I want to write a+b=2+3= and get the answer a+b=2+3=5 Not write: a:=2 b:=3 a+b=5  

Morning to all,   So a few of you have seen I have had varying questions about MC's abilities in the last 24 hours which have lead me to my ultimate question on working with and evaluating volumes.   I am looking to see if MC (and if not taking recomendations for other software) can help me in my next quest.    I am looking at defining a 3D shape (the underwater profile of a ship) and then being able to evaluate the shape i.e. what is its volume, where is its centroid, calculate moments about its centreline etc.    The shape I have in mind can be defined in one of two ways but in both a number of 'slices' of the ship's profile are defined usually in terms of x,y,z ordinates to give a number of 2D profiles either working from front to back or from top to bottom. I know that I could plot each 2D 'slice' in MC and could then evaluate using integration but is it possible to 'put these together' and evaluate the 3D shape in a similar method?    Or is

This is the worksheet corresponding to the blog post Curve Fitting Made Easy.

In the book Физико-математические этюды с Mathcad и Интернет , by the way, mentioned by many mathematicians - Russian and foreign. The most mentioned was "Russian-foreign" mathematician, physicist, engineer, astronomer and philosopher Leonhard Euler. He was born in Switzerland (1707), but he has worked for many years and was buried (1783) in St. Petersburg. At the time of the work on the second edition of the book I was in town Riehen close to Basel, where Euler spent his youth and where Euler in his honor, a memorial plaque.I stood at this memorial sign, remembering math book challenges associated with Euler: the rope formula wound on the pole (p. 141), the method of solving ordinary differential equations (page 222.), The image of the set method using circles (page 265), number theory (p. 338), graph theory (p. 346), shipbuilding theory (study 23), etc. this relief Euler is remarkable in that it is encrypted (see sketch 3.) the name of the great mathematician - Leonard ( "persistent,

Этюд 28 книги "Физико-математические этюды с Mathcad и Интернет" BHL или Заявка на Шнобелевскую премию. The book "Physical and Mathematical Studies with Mathcad and Internet"Color drawings, animations and files of the study 28

I would like to see more fine Mathcad-clock!